stressed over my relationship

am a 37 year old woman who got into a relationship almost 2 years ago after leaving my daughters dad for the first few months i guess everything was going ok but now it seems that am not happy at all because there is alot of conflict due to my 3 year old child the constant fighting over her and the financial birden that we are in is just to much for me ive talked to my boyfriend several times about these situations but i get nowhere ive came to the point of telling him that he must go but he will leave for a few hours but always returns what can i do about this horrifyng situation that i cant seem to have no control